HYPNOSIS AND THE EEG A Quantitative Investigation

Tebécis, A. K.; Provins, K. A.; Farnbach, R W; Pentony, P.

doi:10.1097/00005053-197507000-00001

Cited by 53 publications

(27 citation statements)

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“…Similar conclusions were made from studies of sub jects practising self-hypnosis (13) and transcendental meditation (11). In the hypnosis-study increased 0 -activity was evident when the subjects' eyes were open as well as closed, indicating that drowsiness cannot explain the increase in 0-activity (13). There is some basis, therefore, to postulate similar physiological mechanisms underlying these altered states of consciousness, at least for the earlier stages.…”

Section: Electroencephalogramsupporting

confidence: 58%

See 1 more Smart Citation

A Longitudinal Study of Some Physiological Parameters and Autogenic Training

Tebécis¹,

Ohno²,

Matsubara³

et al. 1976

Psychother Psychosom

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Physiological parameters were studied over 4.5 months in normal high-school girls. One group frequently practised autogenic training (AT) whereas the other (control) did not. After 4.5 months the physiology of the AT, but not the control group had changed to some extent. The mean increase in finger skin temperature in the final session was significantly greater in the AT group than in the control group, especially in subjects who experienced hand warmth during AT. No significant differences between groups were apparent for finger blood flow, but within the AT group the girls who experienced hand warmth showed a significantly greater blood flow than those who did not experience hand warmth. The electroencephalogram (EEC) of the AT group showed significantly more ‘slow’ (δ and Θ) and less fast (α and β) activity than at the beginning of the project. Microvibration (MV) of the thumb did not differ significantly in any comparisons. Both in the AT and control group means there were no significant differences between the periods before, during and after AT although significant changes did occur in some individuals of the AT group in the final session. In particular, in 3 of 14 AT subjects respiration rate decreased markedly even though weekly training had not included any breathing exercises. The results suggest that the effects of AT are predominantly long-term, resulting in gradual physiological changes that are maintained to some extent between practice periods.

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Section: Electroencephalogramsupporting

confidence: 58%

“…The piezoelectric pick-up was sensitive mainly (> 90 %) to vibration parallel to the surface of the disc. Monopolar EEG recordings were made from symmetrical areas on the left and right parietal scalp using conventional silver-silver chloride electrodes, the indifferent lead being attached to the right ear-lobe (13).…”

Section: Methodsmentioning

confidence: 99%

A Longitudinal Study of Some Physiological Parameters and Autogenic Training

Tebécis¹,

Ohno²,

Matsubara³

et al. 1976

Psychother Psychosom

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“…Higher power in the theta frequency band in high than low hypnotizables was reported by several groups [8][9][10][11][12], but no difference was found by others [13,14]. Power differences in other frequency bands were reported less often; more beta activity occipitally right was found in high than low hypnotizables [15] and a positive correlation between hypnotizability and 20-60 Hz activity [16] was reported, while as early as 1971, more power in all bands was reported for high hypnotizables [17].…”

Section: Introductionmentioning

confidence: 65%

EEG Source Localization and Global Dimensional Complexity in High- and Low- Hypnotizable Subjects: A Pilot Study

Isotani

Lehmann²,

Pascual-Marqui³

et al. 2001

Neuropsychobiology

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Individuals differ in hypnotizability. Information on hypnotizability-related EEG characteristics is controversial and incomplete, particularly on intracerebral source localization and EEG dimensionality. 19-channel, eyes-closed resting EEGs from right-handed, healthy, 8 high- and 4 low-hynotizable subjects (age: 26.7 ± 7.3 years) were analyzed. Hypnotizability was rated after the subjects’ ability to attain a deep hypnotic stage (amnesia). FFT Dipole Approximation analysis in seven EEG frequency bands showed significant differences (p < 0.04) of source gravity center locations for theta (6.5–8 Hz, more posterior and more left for highs), beta-1 and beta-2 frequencies (12.5–18 and 18.5–21 Hz; both more posterior and more right for highs). Low Resolution Electromagnetic Tomography (LORETA) specified the cortical anteriorization of beta-1 and beta-2 in low hypnotizables. Power spectral analysis of Global Field Power time series (curves) showed no overall power differences in any band. Full-band Global Dimensional Complexity was higher in high-hypnotizable subjects (p < 0.02). Thus, before hypnosis, high and low hypnotizables were in different brain electric states, with more posterior brain activity gravity centers (excitatory right, routine or relaxation left) and higher dimensional complexity (higher arousal) in high than low hypnotizables.

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“…However, as noted above the sample size in Aikins and Rey's study was small, making it difficult to interpret their result in light of contrasting findings from studies with large sample sizes (n=116) such as that of Varga et al (2011) who reported that those higher in suggestibility actually performed worse on a task switching task, implying reduced flexibility. Sabourin, Cutcomb, Crawford, & Pribram (1990) (Galbraith, London, Leibovitz, Cooper & Hart, 1970;Tebecis, Provins, Farnbach & Pentony, 1975). However, they were able to show that increased theta power is also observed at frontal locations.…”

Section: Frontal Executive Functions and Hypnotic Suggestibilitymentioning

confidence: 99%

The role of frontal executive functions in hypnosis and hypnotic suggestibility.

Parris

2017

Psychology of Consciousness: Theory, Research, and Practice

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There is both theoretical and empirical evidence supporting a role for frontal executive functions (FEFs) in hypnosis and hypnotic suggestibility. However, the precise nature of this involvement is debated. While there is clear evidence that FEFs are impaired under hypnosis, the cause of this decreased function is unclear. Theories make differing predictions as to the role of FEFs in hypnotic suggestibility, with some arguing that decreased baseline (normal function outside of the hypnotic context) FEFs lead to greater hypnotic suggestibility and others arguing that increased baseline FEFs lead to greater hypnotic suggestibility. Other theories posit that suggestibility is more a consequence of attitude rather than aptitude. The present work provides a critical review of the involvement of FEFs in hypnosis and hypnotic suggestibility. The review considers behavioral evidence from studies employing putative frontal lobe tasks including tests of fluid intelligence and both task- and nontask-based neuroimaging evidence. It is determined that the evidence to date is inconclusive and that more work is needed to establish a necessary and sufficient role for FEFs in hypnosis or hypnotic suggestibility. Recommendations are made for future research.

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HYPNOSIS AND THE EEG A Quantitative Investigation

Cited by 53 publications

References 0 publications

A Longitudinal Study of Some Physiological Parameters and Autogenic Training

A Longitudinal Study of Some Physiological Parameters and Autogenic Training

EEG Source Localization and Global Dimensional Complexity in High- and Low- Hypnotizable Subjects: A Pilot Study

The role of frontal executive functions in hypnosis and hypnotic suggestibility.

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